Speedometer

A speedometer, also known as a speed meter, is a gauge that calculates and displays a vehicle’s instantaneous speed. They became available as options in the early twentieth century, then as standard equipment from about 1910 onwards, and are now universally fitted to motor vehicles. A properly functioning speedometer is necessary for safe driving, and if you find yours isn’t, you can get it tested by a mechanic or buy a new one online!

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